1. 1. A septic tank riser is essentially a large tube that extends from the lid of the tank up to the surface of the ground. Once installed it will provide quick access to the septic tank that's easy to find any time there is a problem or it needs to be pumped out.
2. 2. PVC and polyethylene risers are lightweight and easy to install. They are resistant to corrosion and of course will not rust. They also incorporate a gasket seal to keep water from entering and prevent sewer gases from escaping from a leaky lid.